A view of the frozen Xingkai Lake, a border lake between China and Russia, in Northeast China's Heilongjiang Province, Feb. 23, 2019. The largest freshwater lake in northeast China, Xingkai is well-known for its abundant biodiversity and complex ecosystems. Local authorities are warning tourists the ice in the lake has begun melting earlier than in the past. (Photo/VCG)
A view of the frozen Xingkai Lake, a border lake between China and Russia, in Northeast China's Heilongjiang Province, Feb. 23, 2019. The largest freshwater lake in northeast China, Xingkai is well-known for its abundant biodiversity and complex ecosystems. Local authorities are warning tourists the ice in the lake has begun melting earlier than in the past. (Photo/VCG)
A view of the frozen Xingkai Lake, a border lake between China and Russia, in Northeast China's Heilongjiang Province, Feb. 23, 2019. The largest freshwater lake in northeast China, Xingkai is well-known for its abundant biodiversity and complex ecosystems. Local authorities are warning tourists the ice in the lake has begun melting earlier than in the past. (Photo/VCG)